Crusher



March 30 1926 J. R. BAKSTAD v CRUSHER Filed Oct. l' 23 w eJ...

Patented Mar. 30, 1926.

UNITED STATES w V '1578348 PATE-NT OFFICE;

JOHAN B. BAKSTAD, OF CHICAGO, ILLm'OIS.

CBUSHEB.

g Applloationme d October 1, 1928. Serial No. 665,803.

To all whom it may concern:

Be it known that I, JOHAN R. BAKSTAD,

a citizen of the United States, residing at` Chicago,`in the county ofCook and State of Illinois, have invented certain new and usefulImprovements in Crushers, of which the following is a specification.

This invention -elates to crushers.

There are many different types of stone crushers all of which may beused with a degree of success for producing road material which willpass through a one inch ring, as required b v highway departments ofmany States. However, some types of crushers produce too large aproportion of dust and fine particles; others can treat onlycomparatively fine stone or cannot crush hard stone. l\ost crushers inuse produce a percentage of over-size making necessary, screening andrecrushng. Again many types of crushers are unable to produce anappreciable Capacity when crushing to a fine product, or the machine isdesigned to such dimensions that the price of same is prohibitive forthe nature of work in question.

Probably the most successful arrangemcnt for securing the desiredresults is a combination of crushers, such as a jaw crusher for 'primarybreaking, and a disk crusher for secondary breaking, This arrangement,however, in addition to the cost of two machines requires theintroduction of sizing screens for the separation of products fromprimary to secondary units and, usually,

- also equipment for conveying same.

It 'being frequently desirable that the entire combination be portable,it will be ap- A preciated that a single-unit, capable of per; 40forming properly, is much in demand.

There is, and has been for some years, a growing demand for a crusherthat will produce in one operation, or with a single unit, a crushedproduct that will pass through a one inch ring, from stone or gravelboulders ranging in size from four to six inches, and up.

Accordingly, one object of my invention is to provide a simple, durable,eflicient and relatively inexpensive unitary stone crusher *adapted' toovercome the above mentioned disadvantageous and undesirable featuresand adapted to successfully 'meet all of the requirements demanded underservice conditions.

Another object i's` to provide a stone crusher of the above mentionedcharacteristics which is of a readily Portable" nature. These' and otherobjects are accomplished by means of the arrangement disclosed on theaccompanying sheet of drawings, in whichi Figure lis a fragmentaryvertical sec tional View through a stone ,crusher emmostrecent form forfine crushing having a flat crushing'surface at'the bottom of bothstationary and movable dies. However, the jaws can only be made to closeto approximately one-fourth of an' inch due to the rough cast diesurfaces, and with a jaw slip' through occurs in which the product willnot pass through a one inch ring. In addition,.the capacity is very muchreduced. It is found even under the circumstances above mentioned, thereis a'small percentage of large enough size-to require a two and one-halfinch ring' One reason for the slip through is the size of' corrugationsin'the dies, but a coarse corrugation is more m fact necessary, whencrusha satisfactory, ing boulders or 'rock of the size for which variouscrushers are designed.

It is my conclusion that the jaw type of 'movement ranging fromfive-eighths of an 4 inch to three-fourths of an inch considerablecrusher is superior in action to all other types and further that 'finecrushing can be successfully accomplished with aw members if thecrushing surface be materially increased as the stone is graduallybroken up or, in other words, a double path or 'outlet for fine materialbe provided. Based upon this theory, the present design has beenproduced by which a standard jaw crusher of any size maybe built as 'areduction crusher by the introduction of a secondary jaw memberinterposed between the regular aw members.

ioo

Referring first to Figure 1 of 'the drawings, it will be noted that myinvention is disclosed *in connection with a jaw type of crusler havinga stationary jaw 10 and a .cooperating Inovable jaw 11, the latter ofwhich is pivotally mounted at its upper end on a shaft 12 for apurposeto be described later. The stationary. jaw is provided with stationaryjaw die 14 and the movable jaw' nember ,is provided with a die 15. Thenovable "jaw is actuated from a main drive shaft 16, through avtumblershaft 17, tumbler arbor 18 and toggle 19, one end of which toggle. is'carriedn a toggle seat '20 associated with the tumbler arbor and theother end of` the toggle being mounted in a similar toggle 'seat 21carried by the movable jaw 11. A properly anchored sprng rod 22connected to the movable jaw 11 holds the toggle 19 againstdisplacement.

. Heretofore, stone fed between the aw dies 20 14 and 15 have beensubjected to a crush- 3 arate crushig months are provided. i The yauxiliary die 27 is seated 'at 28 in the stationary jaw and is clanpedto sad seat by -a wedge shaped clamping member 29 Secured to thestationary jaw by a bolt 30, the clamping member 29 also acting as aseat or support for the stationary die 14 which is otherwise Secured tothe 'jaw by a clamp 13. Similarly, theseconclary jaw die 26 is held inplace by a clanp 31, which also forms a seat forlthe die .15 carried bythe novable jaw 11, the upper end of the die being clamped in place by awedge shaped clamping member 32.

The design is so worked out that the open.- ing between the regular jawdies' 145 and 15 is always approximately twice the area of each openingof the secondary crusher months or equal to the combined ,area of 5 thetwo. In other words, with an opening of two inches between the regularor primary dies 14 and 15. there will be an opening of only one inchbetween each set of secondary jaw dies, but the width is the same forall three sets of'dies. This relation will remainthe 'same when changingthe jaw opening between the regular dies, because the s'econdary jaw 23is caused to Swing in unison with the primary movable jaw 11 buttherelationship may be changed -as described hereinafter. To acconplishthis re aneans of length of toggle 19.

'the secondary jaws on both sides of the incd is an eccentric Shaft, sothat the-openings between the secondary swinging jaw and its associatedseconda'y dies may be equalized,

if necessary, or to vary the smaller openings with relation to theregular jaw opening'for which it nay be set. For fac'ilitating this. adjustment it will be noted, also, that the pin orshaft 35 to which link 34is connected also has an eccentric shaft. The opening between theprimary jaw dies is varied by As shown, the secondary swingingjaw 23, 35

which is moun'ed between the main jaws and more particularly between thesecond-, ary die members carried by the main jaws,

preferably is wedge or bell shaped so that the secondary mouth openingsgradually narrow toward the lower or exit'ends therel of. The upperendof said jaw is preferably pointed as at 9 and flared for controlling adivision of the flow of crushed material. As' shown in Figure 1,thesecondary swinging jaw member, is pivoted at its upper end, but,

as will be pointed out hereinafter, said secondary swinging menber maybe pivotally supported at its lower end.

The lower or secondary dies 26 and 27 nay wo be separate or cast in onepiece with the regular or primary dies, but by making all dies separatethe primary dies are reversible end for end for double wear, as atpresent, U

and the secondary dies are not only reversi ble but interchangeablebetween the stationary and movable jaws; lVith separate jaws the sanemay be easily and quickly clamped in place as hereinabove described itbeing'. noted that the clamps 29 and 31 serve the double purpose ofclamping the secondary (lies and seating the primary dies.

In Figure 2 of the drawings an arrangement is shown in. which theprimary and secondary dies are cast in a single piece as shown at 36 and37 respectively: Also there is shown a baflle plate 38 for guiding theclischarge from the main portion of the j aw dies to 'the secondary jawdies portions.

When stone is crushed between the primary jaws, same being closed as inordinary practice to from 1 to 2 inch opening, the product is broken upfine enough to enter termediate swinging jaw.

In Figure 3 anarrangement is shownin which the' secondary swinging jaw39` is pivotally mounted eccent-rically on a. pin 40 at its lower endsothat, when free to Swing as a result'ofiown weight-during the outwardmovement of the main Swinging jaw 41, the secondary swinging jaw 39 maySwing to the left to maintain equal mouth openings'42 and 43. .Thesecondary `swinging jaw member is linited in such swingng novement by anadjustable sto'p member 44.

A similar arrangement is shown in Figure 4, which shows, however, theprimary and secondary dies and 46 cast integrally, and a spring 46 forassisting gravity in 'moving the intermediate jaw in one direction.

I lVith a 'egulating stop provided for the intermediate swinging jaw tostop its movement in a'central position between tlesecondary diesurfaces when the primary moving jaw opens to the end of its st-r'oke,it is seenthat the stone which has entered from above will be crushed onboth sides of the intermediate jaw by virtue of the power little morethan one-half of the primary movenent, since the primary moving jaw sswung from thetop, and-the distance traveled increases toward thebottom. i

To make the secondary 'crushing action defii'itely` positive, theintermediate jaw may receive' its movement and crushing powerindependently through connecting rods or toggl'es transmitting powerfrom..

the main shaft. or cam. -This may be accomplished with a connection fromthe tumbler provided with a second toggle seat for a shorter motion, ora connection from the primary swinging jaw arranged in a manner totransmit, to the intermediate jaw .only on-.halfof the full movement ofthe primary swnging jaw, The latter arrangement being preferable, isshown in'Figure 1 of the drawings' With this arrangement the regulating-stop, as shown in Figures '3 and 4, becomes unnecessary. Also, themodified arrangement shown in Figura 5 becomes unnecessary, said latterarrangement including a secondary swinging member 4:7 which is yieldablyheld in a central position by two springs 48 and 49 `Operating betweensuitable abutments 50 and 51 respectively and a depending portion 52extending downwardly from the member 47. 4

In certain figures of the drawings and I particularly as shown in-Figure1, a design is provided witha link or toggle 34 con- IIQCllIfI theprimary' and intermediate jaws which by .vrtue of the two pointsuspension of these parts 'and by ofl'setting the link centers,transmi'ts the desired motion and power to the sccondary crusher months.As pointed out hereinabove the intermediate jaw is Suspended from aneccentric shaft 33, in addition to which the connecting link is alsoprovided with an eccentric shaft -35 for adjustment, so that it ispossible and a. simple matter to regulate the openings to suitrequirenents.

By means of this crusher itis possible to produce in one operation, thecommercial ,one inch product required, and with a' capacitysubstantially equivalent to the same size standard crusler when turni'ngout a two inch product.

It is my intention to 'cover all modifica-` tions of the inventionfalling within the spirit and scope of the following clams.'

I claim:

1. In a crusher, the combination of a plurality of cooperatingrelatively movable' jaw members between which stone is given a primarycrushingin a single path, and means movable with one of said other jawmembers and cooperating with said' jaw members for giving said stone asecondary crushing in a plurality of paths.

2. In a crusher, the combination of aplu- `rality of cooperatingrelativelymovable aw m bers between which stone is crushed, an' means ma plane nt-ermedate said aw ing-the stone a secondary crushing.

. 3. In a crusher, the combination of a -members and movable with one ofsame and plurality of relatively novable jaw members between which stoneis erushed in a single path, and movably mounted means in a planeintermediate said jaw members eooperating with the latter for giving thestone a secondary crushing.

4. In a brusher, the combination of a sta'- tionary jaw member, apivotally mounted jaw member cooperating with said stationary jaw memberfor crushing stone, and means pivotally mounted ina plane between saidstationary and movable jaw members and cooperating therewith for givingthe stone a secondary crushing.

5. In a crusher, the combination of. a stationary jaw member, apivotally mounted jaw member cooperating with said station-` a'y jawmember for' crushing stone, and piv- 'otally mounted means in a planentermedate said statonary .and movable aw members for giving the stone asecondary crush- .ng. a

6'. In a 'crusheythe combination of a stationary jaw member, a movablejaw member cooperating with the stationary jaw member for crushingstone, and af second movable jaw member in a plane intermediate saidstationary and other movable aw mem bers for gv-ng stonea secondarycrushmg.

-7. In a erusher, the -combination of a phi- -rality of relativelymovable spaeed jaw members between which stone is crushed, and anadditional jaw member spaced from the other two movable in unisoh withone of said aforesaid jaw members for controllina' the size of the openings between said adlitional and other'at'oresaid jaw members. V

8. In a crusher, the combination of three relatively movable spaced jawmembers between ,which stone is crushed, certain of said jaw membersbeiugmovable in unison "for controlling the size of the openings throughwhich the/stone passes and one of said jaw members being located in aplane intermediate the other two jaw members.

9. In a erusher, the combination of two primary and one secondaryrelatively mivable aw members arranged whereby st ne is crushed in asingle primary path and in;

two seeondary paths, one primary and the seeondary of said jaw membersbeing connected for simultaneous actuation.

10. In a crusher, the eombination of a stationiry jaw member, a movablejaw member cooperating therewith for erushing stone, and a third jawmember eooperating with said other jaw members for giving the stone asecondary crushing, said third jaw member being movable with saidothermovable jaw member for controlling 'the size of openings betweensaid jaw members, and means for varyng the size ofsaid openings.

11. In a crusher, the c'ombinationof a stationary jaw member, a movablejaw member cooperating therewith for crushing stone, and a third jawmember cooperating with said other jaw members for giving the stone asecondary erushing, said third jew member being movable with said otherm ov-` 'able jaw member forcontrollng the size of openings beween saidjaw members, and eccentric means for varying the size of said openings.

12. In a crusher, the combinatiou of a stationary j aw member, a movablejaw member eooperating therewith for crushig stone, a third j aw membercooperating with said'other jaw members for causing a secondary crushingof the stone,`and a link connectiug said third jaw member and saidmovable jaw member whereby said jaw n'embers may move iu unison.

13. In a crusher, the combination of a stationary j aw mem-ber. amovable jaw' member cooperating therewith for erushing stone, and athird jaw member interposed between said other jaw members for givingstone a i secondary crushing action, and an eceentrie mounting for saidthird j aw member whereby relative aw openngs may be controlled.

14. In a crushen' the combination of a I stationary jaw member, apivotally nouuted jaw member cooperating with said tationary aw membertor erushmg stone` a thrd aw member coopera: ing with said other :law

members t'or giving stone a seeondary erushing, a link conneeting saidthird jaw mem'- ber and thepivotaliy mounted jawmember,'

the connection between said jaw members iucluding an eccetrie shaft,said third jaw e member being mounted upon an eeeentric shaft, and themain pivotally mounted jaw being mounted upon an ecentric shutt wherebythe jaw members may have a relative swinging movement and the jaw Openings controlled. I

Signed at Chicago, Illinois', this 26th day of September, 1923.

JOHAN R. BAKSTAD.

